Guard-gate for swing-bridges



2 Sheets-Sheet 1.

F. ROBHR & E. J. JEYTE. Guard-Gate for SWingFBridges.

No. 225,535. Patented Mar. 1.6', 1350.

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2 Sheets-Sheet, 2.

E. ROEHR 8L E.: J. JEYTE.. Guard-Gate for Swing-Bridges. No. 2&5535

jgjgatented Mar. 16 18'80 51,2 engars m/a i fam, M4/amc y?,

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N:P|'ERS. PHOTO-UTHOGRAPHER. WASHINGTON. ILC.

Nrren rares FRANK ROEHR AND EDWARD A. JEYTE, OF CHICAGO, "ILLINOIS,

GUARD-GATE FOR SWING-BRIDGES.l

SPECIFICATION forming part of Letters Patent No. 225,535, dated March16, 1880.

' Application filed January 29, 1880.

To all lwhom t may concern:

Be it known that we, FRANK ROEHR and EDWARD A. JEYTE, of Chicago, in thecounty of Cook and State of Illinois, have invented certain new anduseful Improvements in Guard- Gates for Swing-Bridges, of which thefollowing is a full, clear, and exact description, which will enableothers skilled in the art to which our invention appertains to make anduse the same.

rIhe object of this invention is to provide a safety gate or gates foruse in connection with swing-brid ges, and the gates are so constructedand arranged as to be automatically operated by the opening and closingof the bridge, the exact arrangement and operation of which will behereinafter more fully explained in detail.

In carrying out our improvement and putting the same into practicaloperation we make use of the mechanism illustrated in the accompanyingdrawings, in which- Figure 1 shows thebridge closed andthe gates open 5Fig. 2, alongitudinal section in the plane a: w, Fig. 3. Fig. 3 showsthe safety-gates in proper position for cutting off the line of travelwhen the bridge is open 5 Fig. 4., a vertical sectional detail in theplane y y, Fig. 3, showing the system of lazy-tongs; and Fig. 5, adetail view of the device operating theside gates.

In referring to the drawings, A represents the bridge proper, and B thepivotal center thereto, and C the bridge approach or abutment. Theupright posts D and the connecting cross-piece E form the lframe-workfor carrying the main central gate, A', and the small or side gates, cc, the main or central gate closing the driveway andthe side gatesclosing the foot passage-way.

The system of lazy-tongs u have a vertical movement, and are placed `onthe sides of the postsD facing the sidewalk, and are concealed from viewby a suitable cap or covering.

The operating connection between the lazytongs and the main gate A isformed by means of the cable or chain 6, one end of which is attached tothe upper end of the lazy-tongs and the other end to the main gate.

To the lower ends of the system of lazy-ton gs is attached the cable orchain 7, traveling on and under the sheaves 8 anmd 9. The horizontalpart of the cable 7 is arranged as shown in4 Fig. 3, and made to passboth over and under `the pulley 10. This cable is secured to the pulley10 in a stationary position, both above and below the pulley, therebyadmitting of the alternate action of these parts as the bridge is openedor closed from either direction.

The lever-arm 1l forms the connection between the bridge and theactuating mechanism controlling the main gate A. The lower part of thislever-arm has bearings in posts 12 and 13, placed un derneath thebridge-approach. The stationary pulley 10 is located upon the lower partof this lever-arm immediately between the posts l2 and 13, as shown inFig. 2 ot' the drawings. On the upper end of this lever-arm is placedthe loose pulley 14, which has a frictional contact with the under sideof the bridge, this lever-arm having a rocking or oscillating movement,and when the bridge is opened or closed this lever-arm is made toincline either to the right or left, as the case may be, and when thebridge is opened and the main gate closed the lever-arm assumes avertical posit-ion, as shown in Fig. 3 of the drawings.

The device 15, as shown in Fig. 5 of the drawings, forms the connectionbetween the bridge and the side gates, t a, the under side of the bridgehaving a bearing on the horizontal end of the device, which, when thebridge is closed, retains the gates a a in an upright position, and whenthe bridge is opened the gates et a gradually assume a horizontalposition, the outer ends resting upon the side railing guarding thebridge-approach, as shown in Fig. 3 of the drawings.

rIhe main gate and the system ot lazy-tongs will be provided with propercounterpoiseweights, insuring a positive action of these parts. The endsof the main gate have bearings in vertical grooves in the posts D, bymeans of which the gate is retained in place as it moves up or down.'When the pressure of the bridge is released from the lever-arm the maingate descends by force of gravity, and when the bridge is closed thelever-arm is inclined to one side or the other, thereby raising the gatethrough the medium of the operating mechanism hereinbefore described.

This safety-gate may be set back on the bridge-approach any distancedesired, all the IOO change required being the lengthening out of thelevers having frietional contact With the bridge.

Having thus described our invention, what We claim as new, and desire tosecure by Letters Patent, is-

l. In a safety bridge-gate, the combination, with the main central gate,A, having a vertical action, of the posts D, the cable or chain 6, andthe system ofiaZy-tongs a', connected to both ends of the main gate,substantially as herein described.

2. The combination, with the system of lazytongs c', moving in avertical plane, of the

